cannot find module 'angular2/core'

For ASP.NET 5.0 applications in VS 2015, configuring typescript is a bit challenging.

Until the tooling around typescript improves, you can configure typescript manually:

Step 1: Right-click project, and Unload Project Step 2: Right-click the unloaded project, and Edit the .xproj fileStep 3: Add a PropertyGroup node, under the Project node:  <PropertyGroup Condition="'$(Configuration)' == 'Debug'">    <TypeScriptTarget>ES5</TypeScriptTarget>    <TypeScriptJSXEmit>None</TypeScriptJSXEmit>    <TypeScriptCompileOnSaveEnabled>True</TypeScriptCompileOnSaveEnabled>    <TypeScriptNoImplicitAny>False</TypeScriptNoImplicitAny>    <TypeScriptModuleKind>CommonJS</TypeScriptModuleKind>    <TypeScriptRemoveComments>False</TypeScriptRemoveComments>    <TypeScriptOutFile />    <TypeScriptOutDir />    <TypeScriptGeneratesDeclarations>False</TypeScriptGeneratesDeclarations>    <TypeScriptNoEmitOnError>True</TypeScriptNoEmitOnError>    <TypeScriptSourceMap>True</TypeScriptSourceMap>    <TypeScriptMapRoot />    <TypeScriptSourceRoot />    <TypeScriptExperimentalDecorators>True</TypeScriptExperimentalDecorators>  </PropertyGroup>Step 4: Right-click the unloaded project and Reload ProjectStep 5: Re-build project

If you are still encountering the error where it cannot find the module, exit visual studio and reload the solution.

Here is my working settings:

<PropertyGroup Condition="'$(Configuration)' == 'Release'">  <TypeScriptTarget>ES5</TypeScriptTarget>  <TypeScriptJSXEmit>None</TypeScriptJSXEmit>  <TypeScriptCompileOnSaveEnabled>True</TypeScriptCompileOnSaveEnabled>  <TypeScriptNoImplicitAny>False</TypeScriptNoImplicitAny>  <TypeScriptModuleKind>System</TypeScriptModuleKind>  <TypeScriptRemoveComments>False</TypeScriptRemoveComments>  <TypeScriptOutFile />  <TypeScriptModuleResolution>NodeJs</TypeScriptModuleResolution>  <TypeScriptOutDir />  <TypeScriptGeneratesDeclarations>False</TypeScriptGeneratesDeclarations>  <TypeScriptNoEmitOnError>True</TypeScriptNoEmitOnError>  <TypeScriptSourceMap>True</TypeScriptSourceMap>  <TypeScriptMapRoot />  <TypeScriptSourceRoot />  <TypeScriptEmitDecoratorMetadata>True</TypeScriptEmitDecoratorMetadata>  <TypeScriptExperimentalDecorators>True</TypeScriptExperimentalDecorators></PropertyGroup>

Restart Visual Studio after applying this to your web project.

For VS2015, go to Tools -> Options -> Text Editor -> TypeScript -> Project -> General then tick "Automatically compile TypeScript files which are not part of a project" then select "Use CommonJS code generation for modules.."